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Updated: May 27, 2026

The Preparation of Electrohydrodynamic Bridges from Polar Dielectric Liquids
10:03

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Published on: September 30, 2014

Why the water bridge does not collapse.

Artem A Aerov1

  • 1Physics Department, Moscow State University, Moscow RU-119991, Russia.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|November 9, 2011
PubMed
Summary
This summary is machine-generated.

A water bridge is a horizontal thread of water. Surface tension, not electrostatic fields, explains its stability by preventing the water from breaking into drops.

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Area of Science:

  • Physics
  • Fluid Dynamics
  • Electrostatics

Background:

  • A 2007 discovery revealed a horizontal water bridge suspended in an electrostatic field.
  • The stability of this water bridge phenomenon requires further explanation.

Purpose of the Study:

  • To propose an alternative explanation for the stability of the water bridge phenomenon.
  • To investigate the role of surface tension and electrostatic fields in water bridge formation and maintenance.

Main Methods:

  • Theoretical analysis of forces acting on the water bridge.
  • Evaluation of the contribution of surface tension versus electrostatic forces.

Main Results:

  • The study proposes that surface tension is the primary force supporting the water bridge.
  • The electrostatic field's role is to prevent the bridge from breaking into droplets by minimizing surface energy.
  • Evidence is presented that the electrostatic field is not the source of the tension holding the bridge.

Conclusions:

  • Surface tension, not electrostatic forces, is the key factor in maintaining water bridge stability.
  • Electrostatic fields play a crucial role in preventing the breakup of the water bridge into smaller drops.